Modeling of Erosion and Deposition Patterns on CW und WTa Twin Limiters Exposed to the TEXTOR Edge Plasmas
In: Journal of nuclear materials 329-333, 732 - 736 (2004). doi:10.1016/j.jnucmat.2004.04.183, 2004
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Zugriff:
The erosion and deposition patterns on tungsten and tantalum test limiters exposed to the TEXTOR deuterium plasma containing a small amount of C impurity are simulated with the modified EDDY code. At the very top of the W and Ta limiters, there occurs neither erosion nor deposition, but the erosion proceeds slowly along the surface. When approaching the edge, the surface is covered by a thick C layer, which shows a very sharp boundary similar to the observation in surface measurements. In the erosion zone, the re-deposited carbon forms a W (Ta)-C mixed layer with small C concentration. Assumptions for chemical erosion yields of similar to0.01 for W and <0.005 for Ta fit the calculated widths of the deposition zone to the experimentally determined values. Possible reasons for the difference between W and Ta are discussed. (C) 2004 Elsevier B.V. All rights reserved.
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Modeling of Erosion and Deposition Patterns on CW und WTa Twin Limiters Exposed to the TEXTOR Edge Plasmas
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| Autor/in / Beteiligte Person: | Ohya, K. ; Tanabe, T. ; Sergienko, G. ; Breszinek, S. ; Noda, N. ; Rubel, M. ; Wada, M. ; Ohgo, T. ; Hirai, T. ; Philipps, A. ; Kirchner, A. ; Pospieszczyk, A. ; Huber, A. |
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| Zeitschrift: | Journal of nuclear materials 329-333, 732 - 736 (2004). doi:10.1016/j.jnucmat.2004.04.183, 2004 |
| Veröffentlichung: | Elsevier Science, 2004 |
| Medientyp: | academicJournal |
| DOI: | 10.1016/j.jnucmat.2004.04.183 |
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